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May 2001
Amtrak Advanced Civil Speed
Enforcement PTC System
Status Report
Jim Hoelscher
ACSES
CBTC Conference 2001
ACSES PTC Overview

Advanced Civil Speed Enforcement System
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Northeast Corridor
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240 Route Mi./ 506 Track Mi.
– Plan 400 route miles/ 1150 Track miles
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48 Interlockings
– Plan ~ 100 interlockings
CBTC Conference 2001
ACSES PTC Overview
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460 Locomotives & Commuter Trains
– AEM 7, F40PH2, GP40, GP9, U23B, B23-7, GP 38,
GE Super 7, MP 15, F40
– Kawasaki, MBB, & Bombardier Control Coaches
– High Speed Locomotives
– ACELA High Speed Tilt Trains
CBTC Conference 2001
ACSES PTC Overview
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Overlays the Cab Signal System
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Independent of Cab Signal
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Cab Signal Provides Speed Limit for Safe Train
Separation and Signal Speed Enforcement
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ACSES Provides Civil (Track) Speed Limit and
Positive Train Stop at Interlocking Home signals
CBTC Conference 2001
Trainborne Equipment
Advanced Display Unit
Radio Antenna
ACSES
Vital on-board Computer
Axle generator
CBTC Conference 2001
Transponder
Reader and
CTV box
ADU
Signal Aspect
Cab Signal
Speed Limit
Enforcement
Indicator
Civil Speed
Limit
CBTC Conference 2001
Transponders
Transponder data contained in Programmable plug
• Operates to 310 MPH
• Passive - No wiring
CBTC Conference 2001
ACSES PTC Overview
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Transponder Operation
– On board antenna transmits 27.115 MHz signal
– Wayside transponder receives signal + Uses
energy in received signal to power transmitter
– Transponder transmits 4.5 MHz data signal
– Message contains 255 bits - 180 bits data, 72 bits
CRC + 3 fill bits
CBTC Conference 2001
ACSES PTC Overview

Transponder Data
– Location of Transponder (RR, Line, MP, Track,)
– Distance to Next Transponder
– Current Civil Speed for 5 Train Types
– Distance to Speed Restriction
– Speed Restriction Speed Limit For 5 Train Types
– Length of Speed Restriction
CBTC Conference 2001
ACSES PTC Overview
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Transponder Data (Cont.)
– Distance to Home Signal
– Grade
– Local ATCS Radio Address and Frequency
– Phase/Power Break Start/Stop Locations
CBTC Conference 2001
ACSES PTC Overview

ATCS 200 Radio Network Data
– Interlocking Home Signal Status
– Interlocking Exit Track
– Start/Stop Location of Temporary Speed
Restriction
– Temporary Speed Limits for Passenger and
Freight
CBTC Conference 2001
ACSES Speed Restrictions
100 mph
80 mph
60 mph
Curves, Bridges, etc.
CBTC Conference 2001
ACSES Positive Train Stop
Target Speed = 0
•Transponder sets stop point at Home signal
•PTS enforced if Cab signal not better than restricting
•Released by radio if the Home Signal not at Stop
•Train civil speed limit through the interlocking is sent
by radio
DS
HS
Radio
Vital
Encoder
CBTC Conference 2001
ACSES PTC
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Phase I
– Civil Speed Enforcement
– Home Signal Stop Enforcement (PTS)
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Phase II
– Radio Release PTS
– Temporary Speed Restriction - On Board Enforcement
CBTC Conference 2001
ACSES PTC Phase I Status
R. I. / Mass.
190.8
Conn./ R.I.
141.1
New
Haven
Nan
113.3
Mill River
73.8
High Street
139.0
In Service Dates
May, 2001
May, 2001
December 10, 2000
May, 2001
CBTC Conference 2001
Boston
Cove
228.0
Junction
214.0
ACSES PTC Phase I Status
Pa./N.J.
57.7
Maryland/Delaware
41.4
Delaware/Pa.
18.2
Washington,
Maryland
D.C.
131.6
Grove
112.4
Landover
128.8
Prince
57.3
Holmes
77.2
Ragan
29.7
In Service Dates
June 30, 2001
Not Scheduled
March 26, 2001
CBTC Conference 2001
Ham
55.5
Morris
58.3
NJ/NYC
1.2
County
32.8
ACSES PTC Phase I Status
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On-board equipment installed & ready for (or in)
service (241 Units)
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77 Amtrak
74 MBTA
24 CSX
16 P & W
14 CDOT
12 High Speed Locomotives
24 Acela
CBTC Conference 2001
ACSES PTC Implementation
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Standard Interfaces designed to allow
application of ACSES on different locomotives
and control cars
– Cab Signals Systems
– Air Brake Interface
– Locomotive Controls
CBTC Conference 2001
ACSES PTC Phase I Operation
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Infrastructure Data Must be Accurate
– Curve Speeds & Locations
– Chaining data
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Operation Problems
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No problems with transponders
Operator’s learning curve
Brake Curves conservative
No Time to Penalty or Brake curve information given
to operator
CBTC Conference 2001
ACSES PTC Phase I Operation
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System Modifications
– Expand wheel size calibration range
– Redefine actions requiring operator
acknowledgement
– Modify Tilt Enable/Disable
– Energize ACSES magnet valve when cutout
CBTC Conference 2001
ACSES PTC Phase II
2oo3
Safety server
Network server - 1
TSR server
Network server - 2
HUB 1
WCC / FPD
1
Multiplexer
To CETC
HUB 2
NMS
WCC / FPD
2
1 of 10
Multiplexer
Multiplexer
1 of 4/5
1 of 10
Multiplexer
1 of 4/5
DSU
DSU
DSU
DSU
A/B switch
BCP
Modem
DSP 9600
Modem
Encoder
MCP
Train
Modem
Encoder
ACSES PTC Phase II Operation
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Temporary speed restrictions (TSR) by CETC
operators
– Current process retained
– Paper copies and/or voice radio updates
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TSRs transmitted to trains in terms of radio
coverage areas
– Train receives all TSRs in direction of travel for current
plus next 2 radio coverage areas
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TSRs enforced by onboard equipment the same
as permanent speed restrictions received from
transponders
CBTC Conference 2001
ACSES PTC Phase II Status
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BCPs delivered
– Antenna sites being determined
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Encoders delivered
– Site specific logic design started
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TSR Input Process & Interface with CETC
operators defined
Office servers and communications network
designed
OBC requirements defined
CBTC Conference 2001
ACSES PTC Phase II Schedule
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Phased implementation
– PTS Radio release
– TSR enforcement
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To be completed 2002
CBTC Conference 2001
PTC Interoperability
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NJT ASES
– Equipment
• Compatible transponders
• Standard antenna/transponder interface
– System
• Transponder messages defined by Amtrak/NJT
CBTC Conference 2001
Conclusion
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In service
– 75 Mile section - December 10, 2000
– 22 Mile section - March 26, 2001
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Provides functionality desired
Operators are learning the conservative nature
of the brake curves
Input from operators is being used to modify
system operation
ACSES + Cab signal provides civil speed, train
separation and signal speed enforcement
CBTC Conference 2001